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39 Cards in this Set
- Front
- Back
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Why are weak passwords a significant problem in networks?
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Because hackers can get in and cause problems
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List three true measures of password quality.
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Is it guessable? is it easy to remember? is it easy for others to remember?
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What is using a dictionary attack?
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It is using a long list of likely passwords in hopes of finding one that works.
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List two types of bad passwords
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anything short, anything in the dictionary
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What do I reccomend for a password
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initial of a familiar phrase
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What is multi-factor authentication?
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asking for several unrelated things to prove identity
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How does rot13 work?
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by replacing each letter by the one 13 letters away
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How do you send a private message to Bob?
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encrypt it with Bob public key
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What is the purpose of encrypting a message?
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Prevent others from understanding it
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What is the purpose of signing a message?
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Authentication
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How do you sign a message?
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by encrypting it with your private key
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How does signing prove authorship?
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Signing has a key unique to the author, and what only the author would know.
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How can Bob send a private, authenticated message to Alice?
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Encrypt it with Bob's private key to prove authorship. Encrypt the result with Alice's public key to provide privacy
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Why are public-key systems special?
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they allow secure connections to be established between computers that don't know each other
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Why is RSA special?
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because it can easily create good public keys
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What is a prime number?
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A number that has no factors
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Why are prime numbers used in encryption?
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Because it is easy to multiply two large prime numbers but it is difficult to find the original number
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What does the RSA private key consist of?
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Two large prime numbers
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What does the RSA public key consist of?
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product of two large prime numbers
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If RSA is so great, why are other things used?
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speed
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Is http considered to be secure? Why?
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no because it is not encrypted
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Is https considered to be secure? Why?
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Yes, the data is encrypted.
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What does SSL stand for?
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secure socket layer
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What does TLS stand for?
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transport layer security
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How does SSL protect confidentiality of a TCP connection?
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because the traffic data encrypted, and it can hide its meaning
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What is an outside threat?
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A threat by a machine outside of your LAN.
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What is a botnet?
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a bot-net is a collection of computers that are controlled by a hacker, usually without the owners knowledge
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What are two things that botnets commonly used for?
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sending spam and doing attacks
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What does DDOS stand for?
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Distributed Denial of Service
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What is a zombie?
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A computer on a botnet
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What does PWN stand for?
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Gain control over a machine.
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What is an Inside Threat?
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a threat by a machine inside of your LAN
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What two things does the server mean?
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it is a program that provides service and a computer where such a program runs.
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How can firewalls mitigate network attacks against servers?
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by only allowing requests based on IP address and port
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How can firewalls mitigate network attacks against clients?
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by stopping unexpected traffic from entering your LAN
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What does DMZ stand for?
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Demilitarized Zone
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What service does DMZ provide?
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it directs all unexpected traffic on all ports to a designated machine
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What service does port forwarding provide?
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it directs unexpected network traffic from a few ports to a designated machine
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How can sharing your Wi-Fi be dangerous?
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bad people can directly get into your LAN. this bypasses your main firewall
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